Hi. If you are talking about activated carbon in the tank, I use ROX 0.8. I get mine from BRS but others sell it too. It seems to work well for a wide variety of organics without much fines/dust. Just clogs quickly, but that reminds me to change it.
If you are talking about activated carbon for the air outside the tank for smells (you mentioned Febreeze) I don't have a recommendation but you can buy bags that recharge in sunlight.